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Publication details

Indirect dark matter searches in the dwarf satellite galaxy Ursa Major II with the MAGIC Telescopes

MAGIC collaboration, Ahnen et al.

First author:
P. Giammaria, S. Lombardi, J. Palacio, M. Vazquez Acosta

Journal

Journal of Cosmology and Astroparticle Physics, March 2018 (Submitted 2017/12/07)

External urlarXiv abstract

Abstract:

The dwarf spheroidal galaxy Ursa Major II (UMaII) is believed to be one of the most dark-matter dominated systems among the Milky Way satellites and represents a suitable target for indirect dark matter (DM) searches. The MAGIC telescopes carried out a deep observation campaign on UMaII between 2014 and 2016, collecting almost one hundred hours of good-quality data. This campaign enlarges the pool of DM targets observed at very high energy (E$\gtrsim$50GeV) in search for signatures of dark matter annihilation in the wide mass range between $\sim$100 GeV and $\sim$100 TeV. To this end, the data are analyzed with the full likelihood analysis, a method based on the exploitation of the spectral information of the recorded events for an optimal sensitivity to the explored dark matter models. We obtain constraints on the annihilation cross-section for different channels that are among the most robust and stringent achieved so far at the TeV mass scale from observations of dwarf satellite galaxies.